68221499253 has 16 divisors (see below), whose sum is σ = 91403875776. Its totient is φ = 45260242560.

The previous prime is 68221499221. The next prime is 68221499261. The reversal of 68221499253 is 35299412286.

It is not a de Polignac number, because 68221499253 - 2⁵ = 68221499221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68221499196 and 68221499205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68221499453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1572825 + ... + 1615617.

It is an arithmetic number, because the mean of its divisors is an integer number (5712742236).

Almost surely, 2^68221499253 is an apocalyptic number.

It is an amenable number.

68221499253 is a deficient number, since it is larger than the sum of its proper divisors (23182376523).

68221499253 is a wasteful number, since it uses less digits than its factorization.

68221499253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45364.

The product of its digits is 1866240, while the sum is 51.

The spelling of 68221499253 in words is "sixty-eight billion, two hundred twenty-one million, four hundred ninety-nine thousand, two hundred fifty-three".